patch 8.1.1128: getwinpos() test does not work on MS-Windows

Problem:    getwinpos() test does not work on MS-Windows.
Solution:   Skip the test.
diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 1f99478..56b36d0 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -1889,8 +1889,9 @@
 endfunc
 
 func Test_terminal_getwinpos()
-  " does not work in the MS-Windows console
-  if has('win32') && !has('gui')
+  " getwinpos() does not work in the MS-Windows console, and the GUI runs the
+  " console version in the terminal window.
+  if has('win32')
     return
   endif